根据句意及所给首字母，完成下列句子。

1. Your shoes are very d_________. Please wash（洗）them.

2. The pay phone is b_________ the building, so we can see it.

3. I'm h_________. Please give me something to eat.

4. There is a museum in our city. We often go there for a v_________.

5. There are so many cars here and it is really a b_________ street.

在OSI模型数据链路层，交换机根据MAC地址指导数据流。